William c



(No Model.)

W. 0. HUMAN. SUSPENSION DEVICE.

No. 509,621. Patented Nov. 28, 1893.

sssssssssssss c UNITED STATES PATENT GEFICE.

WILLIAM C. HOMAN, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE EDWARD MILLER& COMPANY, OF SAME PLACE.

SUSPENSION DEVICE.

SPECIFICATION forming part of Letters Patent No. 509,621, dated November28, 1893.

Application filed April 4:, 1892. Serial N0.42'7,781- (No model.)

To all whom it may concern:

Be it known that I, WILLIAM (J. I-IoMAN, a citizen of the United States,residing at Meriden, New Haven county, Connecticut, have invented a newand useful Improvement in Suspension Devices, of which the following isa specification.

My invention relates to that class of suspension devices in which a lampor similar article is supported within a ring and is intended tofacilitate the introduction or removal of the lamp to or from the ring.

In the accompanying drawings Figure 1 represents in perspective a lampsuspension device embodying my invention. Fig. 2 is an inverted planview of the ring. Figs. 3 and at are perspective views of partsdetached. Fig. 5 is anenlarged View of a portion of the ring shown inFig. 2 partly broken away to show the operation of the device.

The same letters refer to like parts in the several views.

A designates a lamp; 0., an annular bead on the lamp A; B, a harp orlamp supporting frame; C, a ring; C, C, ears on the ring C; c, aninternally projecting rim or flange in the ring 0; c, a recess in therim 0; c, a lug in the ring C; D, a lock button; d, (1, arms on thebutton D; D, a pivot on which the button D turns; E, a key consisting ofstem 6, cam e, flange e, and thumb pieces 6", 6"", Fig. 3, a shoulder onthe cam c.

In the example of my invention illustrated the lamp A, head a, harp B,ring 0, ears C and O, rim 0 and recess a are similar in structure andfunction to the similar parts shown in my United States Patent No.401,781, dated April 23, 1889. Instead of two interiorly projecting lugsc as shown in the drawings of said patent I here show only one such lug.It is evident, however, that in this regard there is no functionaldifference between the two devices. As shown the lug c" is adjacent tothe ear 0. On the opposite side of the ring C and near the ear C thelook button D is secured by means of the pivot D. The lock button D isrecessed so as to form two arms at and d and is free as to partialrotation on the pivot D, so that its arm (1 may swing into the ringopposite to and on a plane with the lug c.

The stem e of thekey E passes upward through a hole drilled for it inthe ring C and is headed or provided with a nut on the upper side of thering so that the key E may rotate on its stem 6. The cam e on the key Eis adapted, as shown in Fig. 2 of the drawings, to strike against thearms (Z and d of the lock button D so as to throw the inner arm cl ofsaid lock button into or out of the ring C. It will be noted that theface of the cam e is shaped to correspond with that of the recessbetween the arms d and (Zso that the button D is securely locked eitherin its working or withdrawn position. If desired the cam 6 may beprovided with a projecting shoulder, 6"" as shown in Fig. 3, adapted topress against the free end of the arm at in passing. In this case therewill be additional frictional resistance to the unlocking of the buttonD forming a safeguard against accidental displacement.

It is clear that the cam e, as shown, is arranged to turn in such adirection as to entirely free itself from the arms d and cl, in otherwords so as to strike first against the outer ends of said arms. It willalso be seen that when the cam c has reached its locking position, asshown in Fig. 5, its further movement in the same direction is preventedby the shape of the opening in the button D between the arms (1 and cl.

The flange 6" on the key E engages with the lower side of the lockbutton D and acts as an additional support therefor. By means of thethumbpiece e' the key E and indirectly the lock button D are rotated.

The operation of my device will be readily understood from the drawings.The keyE being so turned as to withdraw the arm cl of the lock button Dfrom the ring 0 the lamp A is inserted into the ring from below, thebead a resting upon the lug o. By turning the key E the lock button D isthen partially rotated so as to throw the arm at under the head a on thelamp A. The lamp A is thus securely held in the ring C, the bead a, ofthe lamp resting at opposite sides upon the lug c" and the arm (Z. Bymeans of the internal flange 0 above the bead a the lamp A is preventedfrom being lifted from the ring C. It will be seen that when the buttonD has been turned to its locked position nearly a half turn must begiven the key E before the button I) is turned back out of engagementwith the head a of the lamp A. This I consider a great advantage as itforms an eificient safeguard against accidental or careless disen-'gagenlent of the locking device.

I am aware of a previous patent in which is shown a turn button adaptedto rotation and to direct engagement with a bead on the lamp. As beforestated my device is superior to this on account of the play which thecam c has between the arms 11 and d of the lock button D so that the keymay be turned considerably without disengaging the lamp, therebyrendering unlikely that this shall be done Without deliberate intention.My device has the additional advantage over that referred to in that theflange e on the key E engages with the under side of the button Dthereby very much lessening the sh ear on the pi-votD' and thus reducingthe liability of breakage and of serious accident.

I do not Wish to be understood as claiming anything described or claimedin my previous patent, No. 401,78 1,.to which I have referred above.

What I claim as my present invention, and desire to secure by LettersPatent of the United States, is as follows:

1. In a lamp supporting ring in combination a lock button pivotallysecured to said ring formed with two integral arms, one of which isadapted to be thrown into the pe riphery of said ring, a cam workingbetween said .arms and means for rotating said cam, substantially asdescribed,

2. In a lamp supporting ring in combination a lock button pivotallysecured to said ring formed with two integral arms one of which isadapted to be thrown into the periphery of said ring, a cam workingbetween said arms and adapted to hold said button in its locked positionand means for rotating said cam, substantially as described.

3. In a lamp supporting ring in combination a lock button pivotallysecured to said ring formed with two integral arms one of which isadapted to be thrown into the periphery of said ring, a cam workingbetween said arms, a shaft on which said cam is mounted and means asiakeyon said shaft for rotating said cam, substantiallyas described.

4. In a lamp supporting ring in combination a lock button .p'ivotallysecured to said ring formed with two integral arms one of which isadapted to be thrown into the periphery of said ring, a cam workingbetween said arms, .a shaft on which said cam is mounted, a flange orshoulder on said shaft adapted to engage with the lower side of saidbutton and means as-a key by which said cam is rotated, substantially asdescribed.

'O. HOMAN. Witnesses:

GEO. L. COOPER, GEO. M. CHITTENDEN.

